Any way to merge brushes?

[MotoMoto]

My walls are made of multiple brushes so I would have space for the prop door I use is there anyway I can merge the brushes together? because when I try to texture the walls even if they use the same texture it comes out looking fucked up because the textures are mismatched (see screenshot).

 

[Lacry]

I don't think is possible to begin with, and honestly would be a very bad idea for compiling, but you don't need that to align textures.

Just put the same coordinates for the texture and make sure they are aligning the world (in this case).